Top 5 Continuous Glucose Monitors (CGMs) for Diabetes Management

Managing diabetes effectively requires accurate and continuous glucose monitoring. Continuous glucose monitors (CGMs) offer real-time insights that assist individuals in maintaining stable blood sugar levels.

As technology progresses, CGMs have become increasingly precise, convenient, and integrated with insulin pumps. Below, we discuss the top five CGMs of 2025 based on accuracy, usability, and unique features. 

Dexcom G7

The Dexcom G7 is notable for its high accuracy and quick warm-up time. It offers real-time glucose readings every five minutes, enabling continuous monitoring with minimal delay. The sensor is smaller and more discreet than its predecessor, providing a more comfortable option for users.

The Dexcom G7 integrates effortlessly with insulin pumps and is compatible with Android and iOS devices. Unlike older models, it does not require fingerstick calibration, simplifying the diabetes management process.

Abbott FreeStyle Libre 3

Abbott’s FreeStyle Libre 3 is recognized for its compact design and rapid glucose updates. It is the smallest and thinnest CGM available in 2025, providing a comfortable and nearly invisible monitoring experience.

The sensor lasts for 14 days, minimizing the need for frequent replacements. It updates glucose readings every minute and offers optional real-time glucose alarms for convenience. Its no-fingerstick calibration feature delivers a hassle-free solution for those managing diabetes.

Medtronic Guardian 3 Connect System

The Medtronic Guardian 3 Connect System is well-regarded for its ability to detect rapid glucose fluctuations and provide proactive alerts. It monitors glucose levels every five minutes and notifies users when spikes or drops occur.

This system integrates seamlessly with Medtronic insulin pumps, enhancing diabetes management for individuals using an automated insulin delivery system. It is compatible with both iOS and Android devices, ensuring wide accessibility.

Although it requires occasional fingerstick calibration, its accuracy, and predictive alerts make it an excellent choice.

Senseonics Eversense

The Senseonics Eversense stands out because its implantable sensor delivers continuous glucose monitoring for up to six months. This extended wear time significantly decreases the need for frequent sensor replacements, providing convenience for users who prefer long-term solutions.

The smart transmitter offers real-time glucose readings, smartphone alerts, and vibration notifications for enhanced awareness. Although it requires a minor in-office procedure for implantation, its longevity and reliability make it an appealing choice for many.

Omnipod 5 System

The Omnipod 5 System is a revolutionary, tubeless, automated insulin delivery system that integrates effortlessly with a CGM. It features automatic basal insulin suspension and adjustment and auto-correction boluses for improved glucose control.

Its waterproof design enhances durability, making it a practical option for active individuals. Approved for users as young as two, it provides a comfortable tubeless alternative to traditional insulin pumps.

Choosing the Right CGM

Selecting the right CGM depends on several factors, including accuracy, sensor wear time, integration with insulin pumps, and personal comfort. The Dexcom G7 and FreeStyle Libre 3 offer frequent updates, making them perfect for those who require real-time data. The Senseonics Eversense provides the longest wear time, minimizing the need for frequent replacements. 

The Medtronic Guardian 3 or Omnipod 5 integrate seamlessly with insulin delivery systems, which may benefit insulin pump users. The FreeStyle Libre 3 is the most compact option for users who prioritize size and discretion.

Final Thoughts

Continuous Glucose Monitors have transformed diabetes management, offering real-time insights that help individuals maintain stable blood sugar levels. The best CGM for each person depends on their lifestyle, insurance coverage, and specific diabetes management needs. Consulting with a healthcare provider can help determine which CGM best fits an individual’s treatment plan.

Frequently Asked Questions

What is a Continuous Glucose Monitor (CGM)?

A CGM is a wearable device that continuously tracks blood glucose levels throughout the day and night. It provides real-time data, helping individuals with diabetes manage their condition more effectively.

Do CGMs require fingerstick calibration?

Most modern CGMs, like the Dexcom G7 and FreeStyle Libre 3, do not require fingerstick calibration. However, some systems, like the Medtronic Guardian 3, may require occasional calibrations for accuracy.

How long do CGM sensors last?

Sensor longevity varies by brand. The FreeStyle Libre 3 lasts 14 days, while the Dexcom G7 typically lasts 10 days. The Senseonics Eversense stands out with an implantable sensor that lasts up to six months.

Can CGMs replace traditional blood glucose meters?

CGMs provide continuous monitoring, but some users may still need a traditional blood glucose meter for occasional verification, especially in sensor errors or rapid glucose changes.

Do CGMs work with insulin pumps?

Many CGMs integrate with insulin pumps to provide automated insulin delivery. The Dexcom G7, Medtronic Guardian 3, and Omnipod 5 are compatible with specific insulin pump systems.

Does insurance cover CGMs?

Most insurance plans, including Medicare, cover CGMs for individuals with diabetes. Coverage varies depending on the provider and specific device.

Can non-diabetics use CGMs?

Some people without diabetes use CGMs for metabolic health tracking, athletic performance monitoring, and general wellness. However, insurance may not cover CGMs for non-diabetic users.

Are CGMs painful to wear?

CGM insertion involves a small needle, but most users report minimal discomfort. The FreeStyle Libre 3 is mainly known for its small, painless sensor.

What happens if my CGM sensor falls off?

Manufacturers often offer replacement policies if a CGM sensor fails before its intended wear period. Users should check with their device provider for specific guidelines.

Can I shower or swim with a CGM?

Most CGMs are water-resistant. The FreeStyle Libre 3 and Dexcom G7 can withstand water exposure, while the Omnipod 5 is fully waterproof. However, prolonged submersion should generally be avoided.